/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/MPMTransfer.h
Currently only splats mass and momentum
void P2GApplyHelper ( const [TDynamicParticles](API\Runtime\Chaos\Chaos\TDynamicParticles)< T, 3 > & InParticles, const int32 CellIndex, [TArray](API\Runtime\Core\Containers\TArray)< T > & GridData )